The "+ E-Tube port" variant is intended for e-bikes without a free E-Tube port - usually e-bikes with one of these components:
   Satellite System ON/ OFF Switch
   Di2 (electronic gear shifting system)

PROPERTIES:
Activation/deactivation: by turning off/ on the lights
Maximum speed: unlimited
Display shows: real values up to 23 km/h
Compatible with: motors EP8
Not compatible with: Giant Revolt E+ (2022)